My step-sister requests me to record her feet, but she arouses me and performs a satisfying footjob, leading to me ejaculating on her red-painted toes

I was in my step-sister's room, recording her foot fetish video for her boyfriend when she caught me. Instead of being mad, she found it arousing and started teasing me. She asked if I wanted to film her doing something else, and I agreed. She suggested a blowjob from her older boyfriend, which was fine by me. She started by showing off her sexy red toes, then she began sucking my cock. After a hot blowjob, she mounted me and rode me in cowgirl position. The sight of her riding me was so hot that I couldn't hold back and came on her toes. I felt like a true cuckold as my girlfriend was getting pleasure from my step-sister.